Konda Mason (center) watches as Zakiya Harris (left) and Micah Daigle greet each other in the HUB Oakland offices. The HUB surpassed its $100,000 goal toward a co-working and incubator building.

Konda Mason (center) watches as Zakiya Harris (left) and Micah...

There's a growing belief that innovation springs from collaboration - and that collaboration thrives in a shared physical work space. That's why Yahoo chief executive Marissa Mayer called all her telecommuting staffers back to the office earlier this year.

To continue reading this story, you will need to be a digital subscriber to SFChronicle.com.